Essentials Of Modern Business Statistics With Microsoft Excel 8th Edition David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran - Solutions

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Retail chain Kroger has more than 2700 locations and is the largest supermarket in the United States based on revenue. Kroger has invested heavily in data, technology, and analytics. Feeding predictive models with data from an infrared sensor system called QueVision to anticipate when shoppers will
Jon Weideman, first shift foreman for Cut-Rate Machining, Inc., is attempting to decide on a vendor from whom to purchase a drilling machine. He narrows his alternatives to four vendors: The Hole-Maker, Inc. (HM); Shafts & Slips, Inc. (SS); Judge’s Jigs (JJ); and Drill-for-Bits, Inc. (DB).
The Pew Research Center Internet Project provides a variety of statistics on Internet users. For instance, in 2018, 11% (or 220) of the 2002 American adults surveyed were not Internet users. In 2000, 48% of the American adults in the survey did not use the Internet.a. The 2018 sample survey showed
Fewer young people are driving. In 1995, 63.9% of people under 20 years old who were eligible had a driver’s license. Bloomberg reported that percentage had dropped to 41.7% in 2016. Suppose these results are based on a random sample of 1200 people under 20 years old who were eligible to have a
According to Box Office Mojo, the film Black Panther achieved the top opening weekend gross domestic box office ticket sales in 2018 with $202,033,951. The ticket sales revenue in dollars for a sample of 30 theaters is provided in the file Black Panther.a. What is the 95% confidence interval
Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $45,000 and $60,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired.a. What is the planning value for the population
Insure.com reports that the mean annual premium for automobile insurance in the United States was $1365 in 2018. Being from Pennsylvania, you believe automobile insurance is cheaper there and wish to develop statistical support for your opinion. A sample of 25 automobile insurance policies from the
The U.S. Bureau of Labor Statistics reports that 10.2% of U.S. workers belonged to unions in 2018. Suppose a sample of 400 U.S. workers is collected in 2019 to determine whether union efforts to organize have increased union membership.a. Formulate the hypotheses that can be used to determine
In 2018, RAND Corporation researchers found that 71% of all individuals ages 66 to 69 are adequately prepared financially for retirement. Many financial planners have expressed concern that a smaller percentage of those in this age group who did not complete high school are adequately prepared
The American Association of Individual Investors (AAII) conducts a weekly survey of its members to measure the percent who are bullish, bearish, and neutral on the stock market for the next six months. For the week ending March 27, 2019, the survey results showed 33.2% bullish, 39.6% neutral, and
Consumer Reports uses a survey of readers to obtain customer satisfaction ratings for the nation’s largest supermarkets (Consumer Reports website). Each survey respondent is asked to rate a specified supermarket based on a variety of factors such as quality of products, selection, value, checkout
A personal fitness company produces both a deluxe and a standard model of a smoothie blender for home use. Selling prices obtained from a sample of retail outlets follow.a. The manufacturer’s suggested retail prices for the two models show a $10 price differential. Use a .05 level of significance
A sample of 16 items from population 1 has a sample variance s21 = 5.8 and a sample of 21 items from population 2 has a sample variance s22 = 2.4. Test the following hypotheses at the .05 level of significance.a. What is your conclusion using the p-value approach?b. Repeat the test using the
Battery life is an important issue for many smartphone owners. Public health studies have examined “low-battery anxiety” and acute anxiety called “nomophobia” that results when a smartphone user’s phone battery charge runs low and then dies (Wall Street Journal, May 5, 2018). Battery life
Grubhub is a service that delivers food that its customers order online from participating restaurants. Grubhub claims consistent delivery times for its deliveries. A sample of 22 meal deliveries shows a sample variance of 1.5. Test to determine whether H0: σ2 ≤ 1 can be rejected. Use α = .10.
Oil wells are expensive to drill, and dry wells are a great concern to oil exploration companies. The domestic oil and natural gas producer Aegis Oil, LLC describes on its website how improvements in technologies such as three-dimensional seismic imaging have dramatically reduced the number of dry
Suppose that a local chapter of sales professionals in the greater San Francisco area conducted a survey of its membership to study the relationship, if any, between the years of experience and salary for individuals employed in inside and outside sales positions. On the survey, respondents were
Given are five observations for two variables, x and y.a. Develop a scatter diagram for these data.b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?c. Try to approximate the relationship between x and y by drawing a straight line
When trying to decide what car to buy, real value is not necessarily determined by how much you spend on the initial purchase. Instead, cars that are reliable and don’t cost much to own often represent the best values. But, no matter how reliable or inexpensive a car may cost to own, it must also
Given are data for two variables, x and y.a. Develop an estimated regression equation for these data.b. Compute the residuals.c. Develop a plot of the residuals against the independent variable x. Do the assumptions about the error terms seem to be satisfied?d. Compute the standardized residuals.e.
Tablet PC Comparison provides a wide variety of information about tablet computers. Their website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery life, and CPU manufacturer. A sample of 10 tablet computers is shown in
Table 1.7 shows data for eight phones (Consumer Reports). The Overall Score, a measure of the overall quality for the phone, ranges from 0 to 100. Voice Quality has possible ratings of poor, fair, good, very good, and excellent. TalkTime is the manufacturer’s claim of how long the phone can be
Refer to the data set in Table 1.7.a. What is the average price for the phones?b. What is the average talk time for the phones?c. What percentage of the phones have a voice quality of excellent? TABLE 1.7 DATA FOR EIGHT CORDLESS TELEPHONES Overall Score Model Price ($) Brand AT&T
Skechers U.S.A., Inc., is a performance footwear company headquartered in Manhattan Beach, California. The sales revenue for Skechers over a four-year period are as follows:a. Are these cross-sectional or time-series data?b. Construct a bar graph similar to Figure 1.12.c. What can you say about how
The following data show the number of rental cars in service for three rental car companies: Hertz, Avis, and Dollar, over a four-year period.a. Construct a time series graph for the years 1 to 4 showing the number of rental cars in service for each company. Show the time series for all three
The U.S. Census Bureau tracks sales per month for various products and services through its Monthly Retail Trade Survey. Figure 1.12 shows monthly jewelry sales in millions of dollars for 2016.a. Are the data quantitative or categorical?b. Are the data cross-sectional or time series?c. Which four
According to The Wall Street Journal, a startup company’s ability to gain funding is a key to success. The funds raised (in millions of dollars) by 50 startup companies follow.a. Construct a stem-and-leaf display.b. Comment on the display.
The Powerball lottery is played twice each week in 44 states, the District of Columbia, and the Virgin Islands. To play Powerball, a participant must purchase a $2 ticket, select five numbers from the digits 1 through 69, and then select a Powerball number from the digits 1 through 26. To determine
Scores turned in by an amateur golfer at the Bonita Fairways Golf Course in Bonita Springs, Florida, during 2018 and 2019 are as follows:a. Use the mean and standard deviation to evaluate the golfer’s performance over the two-year period.b. What is the primary difference in performance between
Annual revenue for Corning Supplies grew by 5.5% in 2014; 1.1% in 2015; 23.5% in 2016; 21.1% in 2017; and 1.8% in 2018. What is the mean growth annual rate over this period?
Although millions of elephants once roamed across Africa, by the mid-1980s elephant populations in African nations had been devastated by poaching. Elephants are important to African ecosystems. In tropical forests, elephants create clearings in the canopy that encourage new tree growth. In
Heavenly Chocolates manufactures and sells quality chocolate products at its plant and retail store located in Saratoga Springs, New York. Two years ago the company developed a website and began selling its products over the Internet. Website sales have exceeded the company’s expectations, and
Pelican Stores, a division of National Clothing, is a chain of women’s apparel stores operating throughout the country. The chain recently ran a promotion in which discount coupons were sent to customers of other National Clothing stores. Data collected for a sample of 100 in-store credit card
Pelican Stores, a division of National Clothing, is a chain of women’s apparel stores operating throughout the country. The chain recently ran a promotion in which discount coupons were sent to customers of other National Clothing stores. Data collected for a sample of 100 in-store credit card
Construct a histogram for the data in exercise 12.Data from in Exercise 12Consider the following frequency distribution.Construct a cumulative frequency distribution and a cumulative relative frequency distribution. Class 10-19 20-29 30-39 40-49 50-59 Frequency 10 14 17 72
4K televisions (TVs) contain approximately four times as many pixels to display images as a 1080-display TV, and so they offer much higher picture resolution. Suppose that the following survey results show 4K TV ownership compared to ownership of 1080 TVs and other types of TVs by age.a. Construct
The SAT is a standardized test used by many colleges and universities in admission decisions. More than 1.8 million high school students take the SAT each year. The 2019 version of the SAT is composed of two sections: evidence-based reading and writing, and math. A perfect combined score for the
The Sagittarius Casino’s strategy for establishing a competitive advantage over its competitors is to periodically create unique and interesting new games for its customers to play. Sagittarius management feels it is time for the casino to once again introduce a new game to excite its customer
During the summer of 2019, Coldstream Country Club in Cincinnati, Ohio, collected data on 443 rounds of golf played from its white tees. The data for each golfer’s score on the twelfth hole are contained in the file Coldstream12.a. Construct an empirical discrete probability distribution for the
Consider a binomial experiment with two trials and p = .4.a. Draw a tree diagram for this experiment.b. Compute the probability of one success, f (1).c. Compute f (0).d. Compute f (2).e. Compute the probability of at least one success.f. Compute the expected value, variance, and standard deviation.
Data made available through the Petersen-Kaiser Health System Tracker in May 2018 showed health expenditures were $10,348 per person in the United States. Use $10,348 as the population mean and suppose a survey research firm will take a sample of 100 people to investigate the nature of their health
The Economic Policy Institute periodically issues reports on worker’s wages. The institute reported that mean wages for male college graduates were $37.39 per hour and for female college graduates were $27.83 per hour in 2017. Assume the standard deviation for male graduates is $4.60, and for
In 2018, the Pew Internet & American Life Project asked 743 teens aged 13 to 17 several questions about their attitudes toward social media. The results showed that 602 say social media makes them feel more connected to what is going on in their friends’ lives; 513 say social media helps them
The U.S. Golf Association has instituted a ban on long and belly putters. This has caused a great deal of controversy among both amateur golfers and members of the Professional Golf Association (PGA). Shown below are the names of the top 10 finishers in the recent PGA Tour RSM Classic golf
Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. The mean arrival rate is 10 passengers per minute.a. Compute the probability of no arrivals in a one-minute period.b. Compute the probability that three or fewer passengers
The Census Bureau includes nine states in what it defines as the Northeast region of the United States. Assume that the government is interested in tracking unemployment in these nine states and that the random variable of interest is the number of Northeastern states with an unemployment rate that
Consider a Poisson distribution with μ = 3.a. Write the appropriate Poisson probability function.b. Compute ∫ (2).c. Compute ∫ (1).d. Compute P(x ≥ 2).

Essentials Of Modern Business Statistics With Microsoft Excel 8th Edition David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran - Solutions

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